Hemostatic stent
CA 2043601 A1 · Owner: Tessmann, Terri L. · Inventors: Weeks, Vaughan B.; Tessmann, Terri L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stent for both maintaining fluid flow through a body passage and controlling bleeding emanating from the walls of the body passage comprises an elongated tube having a lumen so that fluid can pass therethrough and a hygroscopic/ hydrophilic material which expands when wetted by water or aqueous body fluids to exert a hemostatic pressure to control bleeding emanating from the walls of the body passage. In one embodiment, the hygroscopic/hydrophilic material is coated on the outer wall of the tube. In another, it is in a chamber and in still another the hygroscopic/hydrophilic material is in a portion of the tube. INP\199\65139032, 062890
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.